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In December 2012, a fireball was seen over the skies of Polonnaruwa, Sri Lanka. Over the following few days, fragments of the fireball were collected and sent to Sri Lanka’s Medical Research Institute, where initial microscopic analysis revealed siliceous microalgae known as diatoms.
...
the scientific community was sceptical of the results — and so some fragments were sent to Cardiff University in Wales for further analysis. The researchers at Cardiff are now reporting that they’re sure that these fragments come from an extraterrestrial meteorite — and that there are definitely “fossilized biological structures” within them. Panspermia, it seems, is a go.
Source
- fertilization, the fusing of the gametes to form a zygote
- implantation, the start of pregnancy, occurring about a week after fertilization
- segmentation, after twinning is no longer possible.
- when the heart begins to beat
- neuromaturation, when the central nervous system of fetus is neurobiologically "mature"
* "brain birth" concepts (compare with brain death):
at the first appearance of brain waves in lower brain (brain stem) - 6-8 weeks of gestation (paralleling ′′whole brain death′′)
at the first appearance of brain waves in higher brain (cerebral cortex) - 22-24 weeks of gestation (paralleling ′′higher brain death′′)
- the time of fetal movement, or "quickening"
- when the fetus is first capable of feeling pain
- when it can be established that the fetus is capable of cognition, or neonatal perception
- fetal viability
- birth
Source
If you consider a single celled organism "life" but you do not consider a human embryo in its first trimester "life", then you may just be a hypocrite...
If you consider a single celled organism "life" but you do not consider a human embryo in its first trimester "life", then you may just be a hypocrite...
Originally posted by Theflyingweldsman
reply to post by jheated5
Sperm on its own is no more a lifeform than a bacteria is.
Alone, a sperm can not become anything.
Originally posted by luciddream
reply to post by jheated5
Sperm and a Bacteria is totally different. A sperm is comparable to a Virus, just have genetic code, it does not "survive", does not eat or multiply.
Bacteria is an organism. It Eats, Poops, Multiply and Survives.
Sperm is a haploid(a half), until it merges without a Oocyte, its nothing.
I always laugh when people say "when you masturbate, you kill babies..."
Am I not a lifeform?